Normal weather on 21 September in Los Altos
The weather on 21 September in Los Altos has an average temperature of about 35°C during the day. The maximum temperature can reach up to 39°C, while the minimum temperature can be 32°C.
On average, 6 mm of rain falls in Los Altos on 21 September. The wind speed is 3 Beaufort and mainly comes from Southeast.
21 September Averages for Los Altos
 Average temperature | 35°C |
 Highest daytime temperature | 39°C |
| Lowest daytime temperature | 32°C |
 Total rainfall | 6 mm |
| Rainy days | 1 day |
Temperature on 21 September in Los Altos per Year
This graph shows the measured temperature on 21 September in Los Altos per year, measured in degrees Celsius, over the past years.
Rainfall on 21 September in Los Altos per Year
This graph shows the total measured rainfall in millimeters on 21 September in Los Altos per year over the past years.
Average weather in Los Altos by month
Click on a month below to see in detail how the weather typically is in Los Altos and what to expect. Based on the historical weather data of Los Altos, you can view the average temperature, rainfall, wind, and UV index for each day of the month.